This is my system too. It also works very well for tallying two different counts that occur simultaneously, if they're in the range of 0-9.

Or in a pinch, -9-+9 or 0-19, using memory (short term) or hand inversion (long terms storage) for the extra bit.

In reply to Re^3: My favorite model of computation is ... by SuicideJunkie
in thread My favorite model of computation is ... by AppleFritter

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